EARTH - MOON - EARTH

WELCOME ON THE PAGE DEDICATED TO MY E.M.E ACTIVITY THAT IS EARTH-MOON-EARTH TRASMISSION WHICH EXPLOITS THE PASSIVE REFLECTION OF THE MOON IN  ORDER TO COMMUNICATE WITH OTHER OM. MINE IS A LITTLE STATION DEDICATED TO MOONBOUNCE: LIVING IN THE CENTRE OF MY VILLAGE AND WITH  LITTLE SPACE AROUND, IT WAS THE MAXIMUM I COLULD OBTAIN WITHOUT DRIVING MY NEIGHBOURS MAD! THIS IS ALSO  THE REASON OF MY CHOICE OF WORKING IN 70Cm BAND, BECAUSE OF THE COMPACTNESS OF THE SYSTEM OF THE ANTENNAS AND OF THE REMARKABLE PRESENCE OF 432Mhz ACTIVE EME STATIONS FROM NEARLY ALL OF THE WORLD!

Array composed by:

ANTENNAS : 4 X 21 EL F9FT MAX. ELEVATION 50 DEGREES
                        HORIZONTAL SPACING 1,67METER
                        VERTICAL SPACING 1,60 METER
ANTENNA ROTATOR: YAESU G-600 RC
ANTENNA ELEVATION ROTATOR: YAESU G-500A
LINE CABLE: PRE>RX TRANSVERTER "RT-50/20"
                         P.A > ANT. HELIAX 7/8 "
                         I.F CABLE TO Rx/Tx "RG-58" 35 meters
AT THE TOP OF MAST WAS PLACED A WATERTIGHT BOX CONTAINING THE L.N.A, THE COAX RELAY HF400 AND THE POWER DIVISOR.

System composed by

TRANSVERTER:
Module SSB ELECTRONIC mod. TV 28-432   Output approximately + 20DBm. Next a Home Amplifier with simple pre (2N3866) + 26DBm and the RF POWER MODULES M57745 with 25 Watt OUT.
POWER AMPLIFIER:
HOME MADE WHIT TUBE EIMAC 3CX800a7
L.N.A :
H.M.  18Db gain, Noise figure 0.40Db, utilizes GaAs-FET Type MGF1302, a project by DJ9BV (DUBUS n.2/1993 Pg.28).
SEQUENCER:
Control circuit with three time step for Transmit-Receive Switching. Schematic diagram here!
I.F RX/TX:
FT-990 YAESU + Filter DSP2 By IW5BHY
TOTAL EIRP ~ 47DBW

SCHEMATIC DIAGRAM OF MY 70cm E.M.E SYSTEM

MY SHACK IS LOCATED ON THE FIRST FLOOR OF A FOUR-STOREY HOUSE. IN ORDER TO LIMIT THE LENGHT OF THE CABLES, FROM P.A, TO --> ANTENNA, THE TRANSVERTER ( 432<>28Mhz ) AND THE POWER AMPLIFIER HAVE BEEN SETTLED IN THE GARRET AND  IT  IS  ALL REMOTE CONTROLLED VIA CABLES. THE LENGTH OF THE CABLE, TYPE "RG-58", IS ABOUT 35 METERS IN THE INTERMEDIATE FREQUENCY (28MHZ).